Air-compressor.



G. W. MOORE. AIR GOMPRESSOR. APPLICATION FILED MAR. 23, 1908.

905,21 1 f Patented Dec. 1, 1908.

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CALEB W. MOORE, OF VANCOUVER, WASHINGTON.

AIR-COMPRESSOR.

Specification of Letters Patent.

Patented Dec. 1, 1908.

Application filed March 23, 1908. Serial No. 422,756.

To all whom it may concern:

Be it known that I, CALEB W. MOORE, a citizen of the United States,residing at Vancouver, in the county of Clark and State of Washington,have invented a new and useful Improvement in Air-Compressors, of whichthe following is a specification, reference being had to theaccompanying drawings.

My invention relates to that class of ma: chines operated by liquidunder pressure for the purpose of compressing air in storage reservoirs.y

The object of my invention is to provide a compressor in which clearanceis dispensed with at the end of the stroke of valve stems and a singlefloat will operate valves of one, two or more chambers or reservoirs. Iattain these objects and other advantages by the mechanism,construction, combination, and arrangement of parts illustrated in theaccompanying drawings, which form a part hereof.

The figure is a view in'vertical section.

A. and B. are chambers in which air or liquid are received.

C is a pipe extending into an air reservoir at one end and havingbranches (2-0? at its other end connecting it with chambers A and B resectively.

A eed pipe 2, through which liquid is supplied extends from anyconvenient power source into a valve cylinder 14. This valve cylinderhas two connecting pipes 25--25' in suitable locations with relation tothe valve therein and which pipes extend from the cylinder to chambers Aand B respectively.

A discharge pipe 3 having branches 33 1 connected with the respectiveends of the cylinder 13 extends to a place of discharge which may beinto the power source and allow of the liquid being used again after itsdischarge.

The chambers A and'B haveoutlet pipes 22-22 which extend therefrom intosuitable parts of the cylinder 13.

Piston valves 13 and 14 are placed within the cylinders 13 and 14:respectively and the stems of both valves are pivotally secured to abell crank 12 pivoted on a pin 12.

A vertical rod 11 .is pivoted atits lower end to the bell crank 12. Therod 11 extends upwardly into a valve cylinder 10 and has a valve 11fixedly secured to its upper .end within the cylinder. The cylinder 10is placed without and at the top of the chamber A and from each end ofit extend pipes 2121 into a controlling valve cylinder 8 in suitablelocations relative to the exhaust ports 26 and 26 and other ports of thevalve therein. From the cylinder 8 an outlet pipe cl extends into thereservoir pipe C.

Within chamber A is a vertical rod 4 havmg its lower end mounted in arecess in the bottom of the chamber. Its upper end extends through thevalve cylinder 8 and within the cylinder it has, a piston valve 8rigidly secured to it. Outside of the cylinder the rod 4: carries afixedly secured transverse pin 23 which is mounted in slots of a forkedarm 23 pivotally secured to a bearing 24. An actuating spring24" isconnected with the forked arm 23 which causes the rod 4 to complete itstravel after passing the centerof its stroke and to remain at the end ofstroke until operated by the float 7.

Within chamber A the rod 4 is provided .with buttons 5 -6 rigidlysecured to it near the upper and lowerends of the chamber and also afloat 7 slidably mounted on the rod between the buttons. In branch 0 ofthe reservoir pipe is placed a check valve 9. In branch 0 of thereservoir pipe, is placed a similar check valve 15, the vertical stem 17of which extends downward into chamber B. Upon the lower part of thestem 17 a float 16 is slidably mounted, and on the upper side of thefloat is placed an upward seating valve, the stem having means at itslower end to retain the float thereon. The chambers A and B are providedwith air inlets 18 and 19 respectively each of which has a check valvetherein opening inwardly.

The device is now shown with chamber B filling with liquid anddischarging air under pressure into reservoir pipe C while chamber A isreceiving air through inlet 18 and discharging liquid through the pipe22'. When the float 7 reaches the button 5, its weight thereon depressesthe rod 4 and lowers the piston valve 8 in cylinder 8, the spring 24holding the rod in its'position then assumed.

This movement allows a back pressure of air exerted through pipe (Z andthrough cylinder 8 and pipe 21 into cylinder 10 and thus raises thevalve 11, carrying the rod 11, which forces the air above it through thepipe 21 and out through the port 26. This causes the rod 11 to move thebell crank 12 which in turn reverses the position of the piston valvesin the cylinders 13 and 14: to that shown in the view. When this is doneit will be seen that liquid will flow from pipe 2, and

through cylinder 14: into chamber A by means of pipe 25, while liquidwill be discharged from chamber B through cylinder 13 by means of pipes22 and 3". Air is also then being forced from chamber A throughreservoir pipe C. The valve 18 is closed while valve 19 is open. Thefoot valve 17 and float 16 are auxiliary mechanism, so that it theaction of the controlling mechanism of chamber A should not reverse thevalves in the upper and lower cylinders at the precise moment that airis exhausted in the chamber B, the liquid therein will raise the float16 and thus close the port into reservoir pipe branch 0 by means of thefoot valve 1.7 therein. lVhen chamber A fills with liquid, the float 7engages the button 6 and reverses the valves, causing liquid and air tobe received or discharged as already described and shown in the views.As the mechanism in this chamber controls the valve movement, there isno necessity for the foot valve 17 and float 16 therein.

It is intended that my device may consist of one or more chambersoperated in any case by and from the one controlling piston valve 8 incylinder 8. The mechanism herein shown may be adapted to and placedwithin and upon a single chamber without deviating from the principle ofmy invention.

My device can be used with any ordinary pump or water supply from watermains as the source of power and will thus supply pneumatic pressure forthe various pneumatic tools in use.

Having thus fully described my invention I claim:

1. An air compressor of the character described, having two chambers Aand B pro vided with valved air inlets, valved air outlets opening intoa common reservoir pipe 0, liquid inlets having common opening into afeed pipe connected with a power source. a cylinder with piston valvetherein in said feed pipe, liquid outlets having common opening into adischarge pipe, a cylinder with piston valve therein in said dischargepipe, a pivoted bell crank 12 and valve stems connecting same with theliquid inlet and outlet piston valves, also controlling mechanismcomprising a piston valve 8 secured upon and near the upper end of avertical. red at said rod being mounted in a recess in the bottom ofchamber A and having thereon in suitable places within the chamber,fixed buttons and a slidable float between the buttons, a cylinder 8above the chamber A containing piston valve 8 and having a pipeconnecting it with reservoir pipe C and pipes connecting it withauxiliary cylinder 10, also without the chamber, the auxiliary cylinder10 and valve therein provided with a vertical stem ll connecting thesame with bell crank 12, all substantially as described.

2. In an air compressor oi the character described, controllingmechanism comprising a vertical rod l, slidably mounted at the lower endwithin the bottom of a chamber A, said rod being provided with rigidbuttons in suitable places thereon and a slidable float upon the rodbetween said buttons, a. cylinder 8 above the chamber A, having a. pipeconnecting it with an air reservoir pipe C and pipes connecting it witha motor cylinder, a piston valve 8 rigidly secured upon and near theupper end of the rod lwhich extends through the cylinder 8,substantially as described.

3. In an air compressor of the kind described, the combination of avalve moving means comprising a forked arm 23, pivoted at one end andreceiving a transverse pin oi the valve stem in slots in its arms, andan actuating spring 2st, with controlling mechanism comprising avertical rod 4-, slidably mounted at the lower end within the bottom ofa chamber A, said rod being provided with rigid buttons in suitableplaces thereon and a slidable float upon the rod between said buttons, acylinder 8 above the chamber 11, having a pipe connecting it with an airreservoir pipe C and pipes connecting it with a motor cylinder, a.piston valve 8 rigidly secured upon and near the upper end of the rod 4which extends through the cylinder 8, substantially as described.

CALEB \V. MOORE.

Witnesses lV. VAGONER, M. C. WRIGHT.

